fineleaf water dropwort

Names and Synonyms

Common Names

• Fine-Leaved Water-Dropwort
• Horsebane

Scientific Names

Accepted name

Synonyms

• Phellandrium aquaticum var. microcarpum
• Phellandrium aquaticum
• Selinum phellandrium
• Oenanthe gigantea
• Phellandrium montanum
• Oenanthe aquatica var. batrachiifolia
• Oenanthe phellandrium var. microcarpum
• Phellandrium divaricatum var. fluitans

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, specifically categorized under the class Equisetopsida and subclass Magnoliidae. Within the order Apiales, it is classified under the family Apiaceae and is identified by the genus Oenanthe.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution pattern across several regions in Northern Europe. Its presence can be documented within the borders of Denmark and Finland. Furthermore, the species is found throughout the landscapes of Great Britain and Ireland. The geographical range also extends into the territories of Norway. Together, these locations define the primary northern habitats for Oenanthe aquatica.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Oenanthe aquatica is defined by its strict requirement for high-moisture environments, allowing it to thrive across a diverse range of hydrological landscapes. It is commonly found colonizing the margins and shallow waters of lakes, as well as the flowing currents of rivers and the stagnant, nutrient-rich conditions of swamps. Beyond lowland aquatic systems, its adaptability extends to varied topographical elevations, enabling it to establish itself in mountain regions as well as broad, open plains, provided that the soil remains saturated. This ability to inhabit such a wide spectrum of wetlands—from high-altitude water bodies to lowland alluvial plains—underscores its role as a versatile component of freshwater and semi-aquatic ecosystems.

Habitat :

lakes, mountains, plains, rivers, swamps

Life history

The life history of Oenanthe aquatica is characterized by its existence as a perennial plant, allowing it to persist through multiple growing seasons. It functions primarily as a hemicryptophyte, a life form where the perennating buds are located at or just below the soil surface, protected by leaf litter or substrate. This species exhibits a deciduous nature, shedding its foliage during unfavorable periods to conserve resources. Its biological strategy as a hemicryptophyte ensures its survival and ability to regenerate within its specific ecological niche across successive years.

Deciduousness :

deciduous

Life form :

hemicryptophyte

Lifecycle :

perennial

Morphology

The morphology of Oenanthe aquatica is characterized by its growth form as a non-woody herb and forb. As a self-supporting plant, it does not exhibit climbing or vining tendencies and operates as an independent organism rather than a parasite or epiphyte, maintaining a terrestrial existence. The plant's stature varies significantly, with a minimum height of 0.3 m, a mean height of 0.75 m, and a maximum height reaching up to 1.5 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

1.5 m

Plant height mean:

0.75 m

Plant height min:

0.3 m

Woodiness :

non-woody

Physiology

The physiology of Oenanthe aquatica is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation processes. The plant exhibits a specific leaf morphology, with a mean leaf size of 48.9025 cm² and a highly consistent leaf width that remains constant at a mean, minimum, and maximum of 0.2 cm. Its leaf structure is further defined by a mean Specific Leaf Area (SLA) of 294.38 cm²/g, reflecting its resource allocation strategy regarding leaf mass and area. In terms of nutritional strategies, the species is non-carnivorous and does not function as a nitrogen fixer, relying instead on traditional soil-based nutrient uptake methods.

Carnivory :

non-carnivorous

Leaf size mean:

48.9025 cm²

Leaf width mean:

0.2 cm

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Specific Leaf Area (SLA) mean:

294.38 cm²/g

Reproduction

The reproduction of Oenanthe aquatica is primarily a sexual process, as asexual reproduction is absent in this species. The flowering period typically commences in June and concludes in August. The plant utilizes a biotic pollination syndrome, specifically relying on insects, with bees identified as a key pollinator. Successful fertilization can occur through self-fertilization, ensuring reproductive continuity. Following pollination, the plant produces fruits with a mean length of 0.4 cm. The resulting seeds are quite small, with a minimum mass of 0.00219 g, a maximum mass of 0.00241 g, and an overall mean seed mass of approximately 0.0025573335 g. For the spread of its offspring, the plant employs an unspecialized dispersal syndrome, though it also exhibits autochorous dispersal mechanisms to distribute its seeds.

Dispersal syndrome :

unspecialized

Dispersal syndrome :

autochorous

Flowering time :

Jun

Flowering time :

Aug

Fruit length mean:

0.4 cm

Pollination syndrome :

insect

Pollination syndrome :

bee

Pollination syndrome :

biotic

Reproduction asexual :

absent

Seed mass max:

0.00241 g

Seed mass mean:

0.0025573335 g

Seed mass min:

0.00219 g

Self fertilization :

present

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Oenanthe aquatica has 20 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include 4-Isopropyl-2-cyclohexen-1-one, Apiole, BETA-PHELLANDRENE, CAMPHENE, Coumarins.

4-Isopropyl-2-cyclohexen-1-one

1. Dr. Duke

Apiole

1. Dr. Duke

BETA-PHELLANDRENE

1. Dr. Duke

CAMPHENE

1. Dr. Duke

Coumarins

1. Pharmaceuticals (Basel, Switzerland)

EO

1. Dr. Duke

FAT

1. Dr. Duke

Flavonoids

1. Pharmaceuticals (Basel, Switzerland)

Glycosides

1. Pharmaceuticals (Basel, Switzerland)

Myristicin

1. Dr. Duke

Activities

Oenanthe aquatica has 95 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Antiviral, Abortifacient, Aldose-Reductase-Inhibitor, Allelochemic.

Antioxidant

1. Dr. Duke
2. Pharmaceuticals (Basel, Switzerland)

Antiviral

1. Dr. Duke
2. Pharmaceuticals (Basel, Switzerland)

Abortifacient

1. Dr. Duke

Aldose-Reductase-Inhibitor

1. Dr. Duke

Allelochemic

1. Dr. Duke

Allelopathic

1. Dr. Duke

Allergenic

1. Dr. Duke

Amphetaminagenic

1. Dr. Duke

Anesthetic

1. Dr. Duke

AntiHIV

1. Dr. Duke

Preparations

Oenanthe aquatica has 1 reported preparations identified across 0 scientific publications and several other databases. The most consistently reported preparations include methanolic and aqueous extracts.

Methanolic and aqueous extracts

1. Pharmaceuticals (Basel, Switzerland)